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Insights into Low-Bandwidth and Energy-Efficient Distributed File Systems and Byzantine Agreement

This paper explores the developments in distributed file systems and Byzantine fault tolerance, focusing on five key systems. It highlights LBFS's chunking technique for reduced transfer costs, BlueFS's energy-efficiency strategies, FARSITE's federated storage for untrusted environments, Pergamum's effective archival storage solutions, and Zyzzyva's use of speculative execution for improving fault-tolerant agreement processes. Each system's objectives and methodologies are summarized, providing a comprehensive overview of advancements in storage technologies.

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Insights into Low-Bandwidth and Energy-Efficient Distributed File Systems and Byzantine Agreement

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  1. PAPERS ON THE FIFTH 6360 QUIZ Jehan-François Pâris jfparis@sbcglobal.net Spring 2010

  2. Distributed File Systems • A, Muthitacharoen, B. Chen, and D. Mazieres, A Low-bandwidth network file system, Proc. 18th SOSP Symp., pp. 174–187, 2001. • We discussed the objective of LBFS and its use of chunking to reduce file transfer and file storage costs. We did not discuss any implementation details.

  3. Distributed File Systems • E. B. Nightingale and J. Flinn. Energy-efficiency and storage flexibility in the Blue file system. Proc. 6th USENIX OSDI Conf., pp. 363–378, Dec. 2004. • We discussed the main objectives of BlueFS, its Write to All policy (including e-nodes), how and why aggregating writes can save energy and how BlueFS selects from which device to read data. You should read the paper

  4. Distributed File Systems • A. Adya, W. J. Bolosky, M. Castro, G. Cermak, R. Chaiken, J. R. Douceur, J. Howell, J. R. Lorch, M. Theimer and R.P. Wattenhofer, FARSITE: Federated, Available, and Reliable Storage for an Incompletely Trusted Environment, Proc. 5th USENIX OSDI Symp., Dec. 2002. • We covered the paper in some detail. You are responsible for all the topics discussed in the PowerPoint slides.

  5. Distributed File Systems • M. W. Storer, K.. Greenan, E. L. Miller, K. Voruganti, Pergamum: Replacing Tape with Energy Efficient, Reliable, Disk-Based Archival Storage, Proc. 6th USENIX FAST Conf., pp. 1-16, Feb. 2008. • Focus on tome organization and the choice of tome components, how Pergamum uses two-level redundancy and how it uses algebraic signatures. You should read the paper.

  6. Byzantine Agreement • R. Kotla, L. Alvisi, M. Dahlin, A. Clement and E. Wong, Zyzzyva: Speculative Byzantine fault tolerance, Proc. 21st ACM SOSP Symp., Oct. 2007. • We discussed how Zyzzyva uses speculative execution to speed up Byzantine fault-tolerant agreements and the special role it assigns to the client . We did not discuss the protocol in detail. and skipped the view change sub-protocol.

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